Default css for custom html tags?

问题

I sometimes use custom html tags as containers for other elements:

<message-panel></message-panel>

Does an unknown element like the above have a default set of styles, common among the major browsers?

And, is it possible to set a default style for all unknown elements on a page?

回答1:

All unknown elements have a computed display value of “inline” source

You can use

* { ... }

for all elements, however this means that you overwrite anything non-specific set for default elements too.

It's better to keep to using HTML5 defined tags unless you're doing something along the lines of webcomponents.

来源：https://stackoverflow.com/questions/51438458/default-css-for-custom-html-tags